TWI519386B - Grinding device - Google Patents

Description

Grinding device

The present invention relates to a polishing apparatus for polishing a workpiece to be polished of metal, wood, or the like.

A polishing device in which a rotating polishing body is arbitrarily provided on a rotating shaft, and a rotating polishing body that is sleeved on a rotating shaft is passed through a pressing plate and fastened by bolts, and the fastening is used in the rotating grinding body. The frictional resistance generated by the contact surface with the pressing plate causes the rotating abrasive body to rotate together with the rotating shaft in a state where no idling occurs.

However, in the polishing process, a load is applied to the rotation of the rotating abrasive body, and when the load exceeds the frictional resistance, the rotating abrasive body is idling. Therefore, if the fastening force of the pressing plate is weak, the frictional resistance becomes small and the idling is liable to occur. This is the cause of problems such as melting.

Therefore, a polishing apparatus (hereinafter referred to as a conventional apparatus) in which a rubber sheet is interposed between a rotating abrasive body and a pressing plate to generate a larger frictional resistance has been proposed, and if the rubber sheet or the rotating abrasive body is worn by friction, The tightening force is weakened and the frictional resistance is reduced to cause idling. Therefore, it is necessary to periodically lock and press the rubber sheet and the pressing plate firmly against the rotating abrasive body to maintain a state in which large frictional resistance can be generated. A conventional device for rotating a grinding body requires a lot of time and labor for management work, and because the bolt is firmly fixed, it is difficult to remove the bolt when the replacement is performed, which is a major cause of the reduction in the efficiency of the replacement work.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to provide a polishing apparatus capable of arranging a rotary grinding body in a very simple configuration to rotate together with a rotating shaft, and to rotate the grinding body. The replacement work becomes easy.

The gist of the present invention will be described with reference to the accompanying drawings.

The polishing apparatus of the present invention is a polishing apparatus in which the rotary polishing body 2 is detachably provided on the rotating shaft 1, and the rotating shaft 1 is provided with a turning portion 3, and is provided with the turning portion 3 The turning-fit fitting portion 4 of the swivel-shaped forming hole 4a is provided, and the grinding body-side fitting portion 5 that is fitted and rotated with the turning-fit fitting portion 4 is provided at the end portion of the rotating-polishing body 2 The rotary polishing body 2 and the rotation-adjusting fitting portion 4 are attached to the rotating shaft 1, and the rotation-fit fitting portion 4 is disposed in the turning portion 3 of the rotating shaft 1, and is disposed in the rotating shaft 1 The rotation-rotating portion 3 is fitted to the polishing-body fitting portion 5 provided at the end portion of the rotary polishing body 2 in the rotation-protruding state in which the rotation-rotating portion 3 is rotated, thereby rotating the rotation portion 3 The polishing body 2 is in a state of rotation with respect to the rotating shaft 1, and the front end portion of the rotating shaft 1 is detachably provided with a separation preventing member 6 for suppressing the rotation of the rotating polishing body 2 from the rotating shaft 1. The rotary grinding body 2 is installed to be replaceable.

Further, in the polishing apparatus according to the first aspect of the invention, the turning portion 3 is provided at an end portion of the rotating shaft 1, and the rotating polishing body 2 is sleeved on the rotating shaft 1, and then the turning engagement portion is sleeved. 4. When the polishing body side fitting portion 5 of the rotary polishing body 2 mounted on the rotary shaft 1 is fitted to the rotation molding fitting portion 4, the rotation fitting portion 4 is disposed. In the above-described turning portion 3, after the rotating polishing body 2 and the turning engagement portion 4 are sleeved on the rotating shaft 1, the anti-separation body 6 is attached to the front end portion of the rotating shaft 1, thereby preventing The rotary polishing body 2 and the rotation-protrusion fitting portion 4 are separated.

Further, in the polishing apparatus according to the first aspect of the invention, the turning portion 3 is formed by cutting a tip end portion of the rotating shaft 1 having a circular cross section or forming a concave groove.

Further, in the polishing apparatus of claim 2, the rotation-preventing portion 3 is formed by chamfering a front end portion of the rotating shaft 1 having a circular cross section or forming a concave groove.

Further, in the polishing apparatus according to any one of claims 1 to 4, a concave portion or a convex portion is provided at an end portion of the rotary polishing body 2, and the concave portion or the convex portion is used as the polishing body side fitting portion 5 The rotation-fit fitting portion 4 is provided with a convex portion or a concave portion that is fitted to the polishing-body-side fitting portion 5 formed by the concave portion or the convex portion, thereby providing the rotation-fitting portion 4 and the rotating abrasive body The polishing body side fitting portion 5 at the end of the second portion is attached to be detachable.

Further, in the polishing apparatus according to any one of claims 1 to 4, the separation preventing body locking portion 7 for locking the separation preventing body 6 is provided at the front end portion of the rotating shaft 1, and is used to prevent The separation preventing body 8 that is detached from the separation preventing body 6 that is detached from the separation preventing body 7 is detachably attached to the separation preventing body locking portion 7 , whereby the separation preventing body 6 can be detachably attached The arbitrarily mounted on the rotating shaft 1 is detachably mounted.

Further, in the polishing apparatus of claim 5, the detachment preventing body locking portion 7 for locking the detachment preventing body 6 is provided at the front end portion of the rotating shaft 1, and is used to prevent the detachment preventing body locking portion. The detachment prevention body 8 that is detached from the detachment prevention body 8 is detachably attached to the detachment prevention body locking portion 7, whereby the detachment prevention body 6 is detachably provided in the foregoing Rotate the shaft 1.

Further, in the polishing apparatus of claim 6, the separation preventing body locking portion 7 and the separation preventing body pressing portion 8 are constituted by a one-touch connecting member that performs male-female coupling.

Further, in the polishing apparatus of claim 7, the separation preventing body locking portion 7 and the separation preventing body pressing portion 8 are constituted by a one-touch connecting member that performs male-female coupling.

Since the polishing apparatus of the present invention has the above-described structure, the rotary polishing body can be attached to the rotating shaft in a state of rotation by a very simple structure, and the regular locking operation necessary for the conventional structure becomes unnecessary, thereby improving work efficiency. In addition, it is possible to improve productivity, and it is a polishing apparatus excellent in practicality.

Further, the simple rotation processing of the conventional polishing apparatus can easily realize the rotation-preventing structure of the present invention, and therefore, it is an epoch-making polishing apparatus which is excellent in economical efficiency without wasting the conventional apparatus.

Further, in the inventions of claims 2 to 5, the present invention can be more easily realized, and it is easier to process the conventional device to realize the turning structure of the present invention, and it is a polishing apparatus excellent in productivity and economy.

Further, the inventions of the claims 6 to 9 can make the replacement work of the rotary grinding body easier, in particular, in the invention of the claims 8 and 9, since the one-touch coupling which does not require the tool during the replacement work is employed, Since it is very easy to remove the brake fitting portion and the rotary polishing body from the rotating shaft, the replacement work can be quickly performed, so that the maintenance time can be shortened and higher productivity can be achieved, and since the screwing structure is not used, The influence of the vibration or the like occurring during the treatment does not cause the screw to be loosened. Therefore, there is no need to worry about the detachment of the rotating abrasive body and the rotation-fitting portion during use, and it is not necessary to perform loosening of the screw, regular locking, etc. It is a daily practical management operation and is a grinding device with excellent practicality.

For the preferred embodiment of the present invention, the effects of the present invention are shown in accordance with the drawings and will be briefly described.

According to the present invention, the rotation fitting portion 4 which is attached to the turning portion 3 of the rotary shaft 1 in the state of being rotated is fitted and rotated with the polishing body side fitting portion 5 provided in the rotary polishing body 2 The polishing body 2 itself is not directly connected to the rotating shaft 1 but is attached to the rotating shaft 1 in an indirect state, and the rotating grinding body 2 can be surely rotated relative to the rotating shaft 1 with a very simple structure. Installed in a state of rotation.

In other words, when the rotating shaft 1 and the rotating polishing body 2 are provided in the direct rotation structure, it is necessary to integrally form the rotating shaft 1 and the rotating polishing body 2, or to perform the concave-convex fitting of the rotating shaft 1 and the rotating grinding body 2. In the former case, when the rotary polishing body 2 is to be replaced, since the rotary polishing body 2 and the rotating shaft 1 are integrally formed, it is necessary to replace them together with the rotating shaft 1, which is costly and time-consuming. Further, in the latter case, the rotation of the rotating shaft 1 and the rotary fitting 2 requires high machining accuracy, which increases the cost, and further, for example, the rotating shaft 1 and the rotating grinding body 2 are directly rotated. On the other hand, in the case where the conventional device is processed as described above, the concave portion is relatively easy to form, but the formation of the convex portion is time consuming, and the strength and durability of the additional convex portion are doubtful. Therefore, there is a problem of adapting to the conventional device. .

However, in the present invention, for example, the end portion of the rotating shaft 1 of the conventional device is chamfered or a concave groove is formed to constitute the turning portion 3, and the system is provided to be fitted and rotated with the turning portion 3. The turning-fit fitting portion 4 of the rotary-shaped hole 4a is provided with a polishing-body-side fitting portion 5 that is fitted and rotated with the rotation-fitting portion 4 at the end portion of the rotary polishing body 2, thereby performing a pole on the conventional device. The construction of the present invention can be realized by simple processing.

Further, the rotary polishing body 2 mounted on the rotary shaft 1 in the state of being rotated is prevented from being detached from the rotary shaft 1 by the separation preventing member 6 provided at the front end portion of the rotary shaft 1, and the separation preventing body 6 is Since the front end portion of the rotating shaft 1 is detachably provided, when the rotating polishing body 2 is to be replaced, the rotating polishing body 2 can be easily detached from the rotating shaft 1 by removing the separation preventing body 6, and the rotating body 2 is rotated. The replacement work becomes extremely easy, and the workability is further improved.

[Examples]

Specific embodiments of the present invention will be described with reference to the drawings.

The polishing apparatus of the present embodiment is a polishing apparatus in which the rotary polishing body 2 is detachably mounted on the rotary shaft 1. As shown in Figs. 1 and 2, the rotary shaft 1 is provided with a rotation/rotation unit 3, and The rotation fitting portion 4 of the rotation-shaped hole 4a that is fitted and rotated with the rotation-preventing portion 3 is provided, and the rotation-molding portion 2 is provided at the end portion of the rotary polishing body 2 to be fitted and rotated. In the polishing body side fitting portion 5, the rotating polishing body 2 and the rotation forming fitting portion 4 are attached to the rotating shaft 1, and the rotation fitting portion 4 is disposed in the rotating portion 3 of the rotating shaft 1. The rotation fitting portion 4 that is disposed in the rotation portion 3 and that is in the rotation state with respect to the rotation shaft 1 is fitted to the polishing body side fitting portion 5 provided at the end portion of the rotary polishing body 2 In this manner, the rotating polishing body 2 is rotated in a state of rotation with respect to the rotating shaft 1, and the front end portion of the rotating shaft 1 is detachably provided to prevent separation of the rotating polishing body 2 from the rotating shaft 1. In the body 6, the rotary abrasive body 2 is mounted to be replaceable.

Specifically, the rotating shaft 1 is formed in a rod shape having a circular cross section, and is rotatably protruded from a rotation driving unit 9 such as a motor.

Further, a turning portion 3 is provided at a front end portion of the rotating shaft 1, and the turning portion 3 is formed by cutting a front end portion of a rotating shaft 1 having a circular cross section or forming a concave groove to form a turning shape. In the present embodiment, as shown in FIG. 3(a), the upper and lower end portions (left and right end portions) of the front end portion of the rotating shaft 1 are chamfered to form a biplanar shape.

Further, the turning portion 3 is not limited to the above-described structure, and as shown in the third (b) to (e), for example, a cross-sectional D-shape, a square shape, a polygonal shape, or a structure in which a groove groove is formed and a chain groove is formed is formed. In addition, any structure that can be a turning shape can be suitably employed. Further, the turning portion 3 may be provided at the base end portion of the rotating shaft 1, and the turning portion 3 may be provided on the rotating shaft 1. In the case of the base end portion, for example, a convex portion (a ridge portion) may be protruded from the axial peripheral surface of the rotary shaft 1.

Further, the rotary polishing body 2 that is placed over the rotating shaft 1 is composed of a polishing body mounting base 2a and a polishing body 2b.

Specifically, the polishing body mounting base 2a is formed in a cylindrical shape having a ring-shaped annular shape in which the shaft hole 10 that can be fitted to the rotating shaft 1 is formed, and is provided at the end portion to be rotated and rotated to be described later. The grinding body side fitting portion 5 that is fitted; more specifically, as shown in Fig. 2, when the rotating polishing body 2 is sleeved on the rotating shaft 1, the end portion is disposed at the front end side of the rotating shaft 1 The end surface is provided with two fitting holes 5a in an opposed state, and the two fitting holes 5a constitute a polishing body side fitting portion 5 that is fitted and rotated with the rotation forming fitting portion 4.

Further, the number of the fitting holes 5a constituting the polishing body side fitting portion 5 is the minimum number of structures that can be more appropriately rotated during the rotation, and in this embodiment, two fittings are provided. The number of the fitting holes 5a is not particularly limited as long as the number of the fitting holes 5a can be adjusted.

Further, in the present embodiment, the polishing body side fitting portion 5 is constituted by two fitting holes 5a as described above, and the polishing body side fitting portion 5 has a structure having a convex portion, in addition to the hole (recessed portion). The rotation-fit fitting portion 4 has a structure having a concave portion, and the rotation-fit fitting portion 4 and the polishing-body-side fitting portion 5 may be a rotation-preventing structure for performing the concave-convex fitting; For example, a female screw portion is formed on the distal end side end surface of the rotary polishing body 2 to constitute the polishing body side fitting portion 5, and the rotation molding fitting portion 4 may be screwed together.

Further, the polishing body 2b provided on the polishing body mounting base 2a is formed of an elongated rectangular (ribbon) polishing cloth.

In this way, the rotary polishing body 2 of the present embodiment is a plurality of polishing bodies 2b formed of a polishing cloth, and is provided in a protruding state in the radial direction of the circumferential surface of the cylindrical polishing body mounting base 2a, and the polishing is performed. The longitudinal direction of the body mounting base 2a is set to be in a parallel state at predetermined intervals.

Further, in order to rotate the polishing body 2 with respect to the rotating shaft 1, the manufacturing fitting portion 4 is used in the present embodiment.

The rotation-fitting portion 4 is formed in a disk shape having a substantially equal diameter with the rotary polishing body 2, and a rotation-shaped hole 4a that is fitted to the cross-sectional shape of the rotation-preventing portion 3 is provided at the center portion, and is formed on one of the plates. Two fitting convex portions 4b for fitting into the fitting holes 5a provided in the polishing body side fitting portion 5 of the rotary polishing body 2 are protruded from the surface.

Further, the structure of the rotation-fit fitting portion 4 can be fitted to the rotation-rotating portion 3 of the rotary shaft 1 and can be fitted to the polishing-body-side fitting portion 5 of the rotary polishing body 2 Therefore, the shape of the wrap-around hole 4a may be a shape corresponding to the wrap-around shape of the turning portion 3, for example, a D-shape, a square shape, or a polygonal shape having the same shape as the cross-sectional shape of the tumbler portion 3 described above. Alternatively, the shape of the convex portion to be fitted to the chain groove of the turning portion 3 may be provided.

In addition, as in the case where the polishing body side fitting portion 5 is provided with the convex portion as in the above, the fitting portion 4 is provided in the rotation molding fitting portion 4 as described above. The configuration of the holes can also be appropriately changed with respect to the number of settings thereof.

In addition, in order to prevent the rotation of the rotation-molding portion 4 and the polishing-body-side fitting portion 5 from being loosened, and in order to prevent the rotary polishing body 2 from being detached from the rotary shaft 1, the present embodiment is at the front end portion of the rotary shaft 1. Set the anti-separation body 6.

Specifically, after the rotating shaft 1 is sleeved with the rotating polishing body 2 and the turning engagement portion 4, the separation preventing body 6 is provided at the front end portion of the rotating shaft 1 to prevent the rotating polishing body 2 and the turning engagement portion 4 from coming off. More specifically, the anti-separation body locking portion 7 for locking the separation preventing body 6 is provided at the front end portion of the rotating shaft 1, and the anti-separation body locking portion 7 is provided to prevent the rotating grinding body 2 from being attached. And the separation preventing body 6 from which the rotation preventing fitting portion 4 is detached, and the detachment prevention body pressing portion 8 for suppressing the separation preventing body 6 from being detached from the detachment preventing body locking portion 7, and being detachably attached to the detachment preventing portion The body locking portion 7 is detachably attached to the rotating shaft 1 by the detachable body 6.

In the present embodiment, the separation preventing body 6 is a flange which is larger in diameter than the rotation-shaped hole 4a of the rotation-protruding fitting portion 4 and has a through-hole 6a at the center portion, and is sleeved on the separation preventing body. On the 7th.

Further, in the present embodiment, as shown in Fig. 4, the separation preventing body locking portion 7 for arranging the separation preventing body 6 and the separation preventing body 6 which is fitted over the separation preventing body locking portion 7 are provided. The separation preventing body pressing portion 8 that is detached from the separation preventing body locking portion 7 is constituted by a one-touch connecting member that performs male-female coupling with each other. In the present embodiment, the separation preventing body locking portion 7 is a male side (plug side) constituting the one-touch type coupling member, and the separation preventing body pressing portion 8 is a female side (seat side) constituting the one-touch type coupling member.

Therefore, as shown in FIG. 5, the anti-separation body pressing portion 8 of the present embodiment can be operated in a one-touch manner by performing a sliding operation on the cylindrical portion 8a provided outside the outer periphery of the separation preventing body pressing portion 8. Since the separation preventing body locking portion 7 is fixed and opened, the loading and unloading operation is extremely easy, and the replacement work is easier to perform than conventionally.

Further, in the present embodiment, the above-described structure is adopted for the detachment prevention of the rotary polishing body 2 and the slewing and fitting portion 4. For example, the detachment prevention member 6 is a long type detachment preventing pin which is longer than the hole diameter of the slewing hole 4a. A pin hole is provided in the detachment preventing body locking portion 7, and a detachment preventing pin may be inserted into the pin hole. Further, for example, a male screw portion is formed in the detachment preventing body locking portion 7, and the detachment preventing body pressing portion 8 is a snail. The nut may be coupled to the male thread portion; or the anti-separation body locking portion 7 may be a screw hole, and the anti-separation body pressing portion 8 may be formed by a screw; and the anti-separation body 6 may be locked to the rotation. The structure of the shaft 1 can be variously used as long as it can exert the effects of the present embodiment.

The mounting sequence of this embodiment of the above configuration is as follows.

As shown in FIG. 2, the washer 11 is sleeved on the rotary shaft 1, and then the rotary polishing body 2 is placed, and the washer 11 and the rotary polishing body 2 are pushed toward the base end side of the rotary shaft 1.

Further, in the structure of the present embodiment, the gasket 11 is provided between the rotary drive unit 9 and the rotary polishing body 2, thereby reducing the frictional resistance caused by the contact between the end faces of the rotary drive unit 9 and the rotary polishing body 2, but It is also possible to adopt a structure in which the gasket 11 is not provided.

Then, the rotation-fit fitting portion 4 is placed on the rotating shaft 1 and disposed on the turning portion 3 of the rotating shaft 1, and is set in a rotation state with respect to the rotating shaft 1, and the turning-fit fitting portion in the turning state is set. 4 is fitted to the polishing body side fitting portion 5 of the rotary polishing body 2, whereby the rotary polishing body 2 is brought into a rotation state with respect to the rotating shaft 1.

Then, the separation preventing body 6 is placed on the separation preventing locking portion 7 provided at the front end portion of the rotating shaft 1, and finally, the separation preventing body pressing portion 8 is sleeved on the front end portion of the separation preventing body locking portion 7.

Further, in the case where a gap is generated due to the length error of the rotary polishing body 2, a gasket (including a spring washer) may be inserted as a spacer before the detachment prevention member 6 is inserted.

Further, at the time of detachment, the outer tubular portion 8a of the detachment prevention body pressing portion 8 is slidably operated, and the detachment prevention body pressing portion 8 is opened with respect to the detachment prevention body locking portion 7, and then pulled out, that is, It can be easily detached, and then the rotary grinding body 2 and the slewing fitting portion 4 can be detached from the rotary shaft 1 in the reverse order of the mounting.

As described above, in the present embodiment, it is extremely easy to mount the rotary polishing body 2 on the rotary shaft 1, and it is easy to be detached from the rotary shaft 1, so that the replacement work becomes easier than conventionally, and the time for replacement work can be shortened to realize production. Sexual improvement.

Further, since it is not necessary to use a screw, it is not necessary to perform a regular locking operation which is required for the conventional structure, and the work efficiency can be further improved, and the polishing apparatus which is further excellent in productivity can be further improved.

Further, since the conventional polishing apparatus can easily realize the rotation-preventing structure of the present invention by simple additional processing, it does not cause waste of the conventional apparatus, and is an economical and excellent epoch-making polishing apparatus.

Further, the present invention is not limited to the embodiment, and a specific configuration of each constituent element can be appropriately changed.

1. . . Rotary axis

2. . . Rotating grinding body

3. . . Turning department

4. . . Turning and fitting part

4a. . . Rotating shape hole

5. . . Grinding body side fitting

6. . . Anti-separation

7. . . Anti-separation body locking portion

8. . . Anti-separation body pressing part

Fig. 1 is a perspective view showing the embodiment.

Fig. 2 is an exploded perspective view showing the embodiment.

The third (a) to (e) drawings are explanatory views showing other examples of the turning shape of the present embodiment.

Fig. 4 is a cross-sectional view showing the present embodiment.

Fig. 5 is an explanatory sectional view showing the anti-separation body pressing portion of the present embodiment.

2. . . Rotating grinding body

2a. . . Abrasive body mounting base

2b. . . Abrasive body

4. . . Turning and fitting part

6. . . Anti-separation

8. . . Anti-separation body pressing part

8a. . . Outer tube

9. . . Rotary drive

Claims (7)

A polishing apparatus is a polishing apparatus that is provided with a rotating polishing body that is replaceably provided on a rotating shaft, and is characterized in that the rotating shaft is provided with a turning portion, and is provided with a system for performing rotation and fitting with the turning portion a turning-fit fitting portion of the rotary-shaped hole, a polishing body-side fitting portion that is fitted and rotated with the rotation-protrusion fitting portion is provided at an end portion of the rotary polishing body, and the rotating abrasive body is attached to the rotating shaft And the above-described turning-fit fitting portion, wherein the turning-fit fitting portion is disposed in the turning-rotating portion of the rotating shaft, and the turning-forwarding portion is disposed in the turning-rotating portion and is in a state of rotation with respect to the rotating shaft The joint portion is fitted to the polishing body side fitting portion provided at the end of the rotary polishing body, whereby the rotary polishing body is rotated in a state of rotation with respect to the rotating shaft, and the front end portion of the rotating shaft is detachably attached Provided to prevent the detachment of the rotating abrasive body from the rotating shaft, and to install the rotating abrasive body to be replaceable; the rotating portion is provided at an end portion of the rotating shaft, and the rotating shaft is sleeved on the rotating shaft Set up the aforementioned rotary research When the polishing body-side fitting portion of the rotary polishing body mounted on the rotating shaft is fitted to the rotation-protrusion fitting portion, the system is inserted into the body-fitted fitting portion. The merging portion is disposed in the rotation-rotating portion, and the detachable polishing body and the rotation-preventing fitting portion are sleeved on the rotating shaft, and the detachment preventing member is attached to the front end portion of the rotating shaft, thereby preventing the aforementioned The rotating grinding body and the turning engagement portion are separated. The polishing apparatus according to the first aspect of the invention, wherein the turning portion is formed by chamfering a front end portion of the rotating shaft having a circular cross section or forming a concave groove. The polishing apparatus according to the first or second aspect of the invention, wherein a concave portion or a convex portion is provided at an end portion of the rotary polishing body, and the concave portion or the convex portion is used as the polishing body side fitting portion. The fitting portion is provided with a convex portion or a concave portion that is fitted to the polishing body side fitting portion formed by the concave portion or the convex portion, whereby the rotation fitting portion and the polishing body provided at the end portion of the rotating abrasive body are provided The side fitting portion is installed to be freely insertable and detachable. The polishing apparatus according to the first or second aspect of the invention, wherein the front end portion of the rotating shaft is provided with an anti-separation locking portion for locking the anti-separation body, which is used to prevent the disengagement body card The separation preventing member that is detached from the stopper is detachably attached to the separation preventing body locking portion, whereby the separation preventing member is detachably provided on the rotating shaft. The polishing apparatus according to the third aspect of the invention, wherein the front end portion of the rotating shaft is provided with an anti-separation body locking portion for locking the separation preventing body, and is used for preventing the disengagement body locking portion. The anti-separation body pressing portion that is detached from the above-described anti-separation body is detachably attached to the anti-separation body locking portion, whereby the separation preventing body is detachably provided on the rotating shaft. The polishing apparatus according to claim 4, wherein the separation preventing body locking portion and the separation preventing body pressing portion are configured by a one-touch connecting member that performs male-female coupling. The polishing apparatus according to claim 5, wherein the separation preventing body locking portion and the separation preventing body pressing portion are configured by a one-touch coupling that performs male-female coupling.